Storage Wars: how citrate-capped silver nanoparticle suspensions are affected by not-so-trivial decisions

Gorham, Justin M.; Rohlfing, Anne B.; Lippa, Katrice A.; MacCuspie, Robert I.; Hemmati, A; Holbrook, R. David

doi:10.1007/s11051-014-2339-9

Cited by 58 publications

(56 citation statements)

References 30 publications

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“…Specifically, the characteristic yellow/brown color representative of AgNP suspensions (see Figure 1(B) as an example from a separate study) is observed on the threads in varying shades, from a dark yellow/brown in validation thread 1 to a faint yellow for validation threads 4 and 5 [3,4]. This should be especially evident since a white thread was employed (see control in Figure 1 (A)).…”

Section: Discussionmentioning

confidence: 91%

“…The chemical reduction of Ag + to form AgNPs stabilized with citrate is a commonly utilized synthesis method designed to make a relatively uniform suspensions of particles in water, typically with a particle diameter near 20 nm [3,4]. These suspensions are employed in studies involving stability, fate and transport as well as in further processing to yield more chemically complex systems.…”

Section: Principles and Scopementioning

confidence: 99%

“…The first focuses on the AgNPs and examines their formation and stability in various environments [3][4][5], using the information learned towards predicting likely behavior in applications after incorporation into a material or product. The scientific understanding gained from studying the formation and stability of AgNPs in various environments can be used to provide engineering guidance for the safe storage and handling of AgNP suspensions [4] and for the development of AgNP reference materials [1,5] for instrument calibration or measurement intercomparison. The second approach focuses on AgNP -containing products, such as textiles, and examines the release of Ag in various environments [6], using the information learned towards assessing the binding strength of Ag to a textile.…”

Section: Introductionmentioning

confidence: 99%

“…AgNPs for the test material are generated by a solution-based reduction technique while cotton threads are fully immersed in the solution. The threads are then examined using analytical techniques typically employed by researchers to characterize AgNPs [3,4,6].…”

Section: Introductionmentioning

confidence: 99%

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Preparation of silver nanoparticle loaded cotton threads to facilitate measurement development for textile applications

Gorham¹,

Murphy²,

Liu³

et al. 2015

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iii FOREWORD This NIST Special Publication (SP) is one in a series of NIST SPs that address research needs articulated in the National Nanotechnology Initiative (NNI) Environmental, Health, and Safety Research Strategy published in 2011 [1]. This Strategy identified a Nanomaterial Measurement Infrastructure (NMI) as essential for science-based risk assessment and risk management of nanotechnology-enabled products as pertaining to human health, exposure, and the environment. NIST was identified as the lead federal agency in the NMI core research area of the Strategy. This research area includes development of measurement tools for the detection and characterization of engineered nanomaterials in nanotechnology-enabled products. Textiles containing silver nanoparticles, the focus of this SP, are consumer products of great interest for nanotechnology environmental, health, and safety (nano-EHS) research and for product regulation.The protocol presented in this SP describes a strategy for developing a validation known to contain silver nanoparticles loaded onto the surface of a cotton thread. These validation threads can be used to test the capabilities of various analytical methods to characterize silver nanoparticles in textiles. Updates to this protocol may be released in the future. Visit http://nist.gov/mml/np-measurement-protocols.cfm to check for revisions of this protocol or for new protocols in the series. We also encourage users of this protocol to reference it in their publications.1

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Section: Discussionmentioning

confidence: 91%

Section: Principles and Scopementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Preparation of silver nanoparticle loaded cotton threads to facilitate measurement development for textile applications

Gorham¹,

Murphy²,

Liu³

et al. 2015

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“…UV-VIS absorption bands are related to important properties such as the diameter [5], shape [2], and polydispersion [6] of metallic and 2 https://doi.org/10.6028/jres.122.037 semiconductor NPs. Thus, this analytical technique is used during NP synthesis to monitor NP formation, to assess suspension stability under different conditions and media [7,8], and to establish the optical properties of the newly formed nanomaterials [9].…”

Section: Discussionmentioning

confidence: 99%

NanoUV-VIS: An Interactive Visualization Tool for Monitoring the Evolution of Optical Properties of Nanoparticles Throughout Synthesis Reactions

Jiménez¹,

Sarmanho²,

Murphy³

et al. 2017

J. RES. NATL. INST. STAN.

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Engineered nanoparticles (NPs) are being used for a broad array of high technology applications including sensing, imaging, targeted drug delivery, bio-diagnostics, catalysis, optoelectronics and film growth seeding. The enhanced optical, electrical and catalytic properties of metal NPs are strongly correlated with their size, shape, and structure. As such, physicochemical characterization of NPs is critically important to ensure their effective use and applicability. In this context, Ultraviolet/Visible Spectroscopy (UV/VIS) is one of the most widely used methods for measuring the optical properties and electronic structures of NPs. UV/VIS absorption bands are related to important properties such as the diameter, shape, and polydispersity of metallic and semi- conducting NPs. Thus, this analytical technique is used during NP synthesis to monitor NP formation, assess suspension stability under different conditions and media, and to establish the optical properties of the newly formed nanomaterials. In view of the extensive use of UV/VIS for NP characterization and monitoring of NP formation during synthesis reactions, we have developed NanoUV-VIS, an interactive web application designed for the analysis of multiple UV-VIS absorbance spectra measured as a function of time. Graphical visualizations of the data in 2 dimensions (spectrum plot, contour plot) and 3 dimensions (surface plot) are created by this tool. In addition, the NanoUV-VIS tool evaluates and estimates important parameters related to the absorption bands of NPs, including, maximum optical absorbance, Surface Plasmon Resonance (SPR) peak and the Full Width at Half Maximum (FWHM) of the UV/VIS spectra. This information is available to download as a table in the software, as well as in the form of interactive plots, where the scientist can compare the behavior of these parameters in order to better interpret the outcomes of the experiment.

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Overcoming challenges in single particle inductively coupled plasma mass spectrometry measurement of silver nanoparticles

et al. 2017

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Single particle ICP-MS has evolved rapidly as a quantitative method for determining nanoparticle size and number concentration at environmentally relevant exposure levels. Central to the application of spICP-MS is a commonly used, but not rigorously validated, calibration approach based on the measured transport efficiency and the response of ionic standards. In this work, we present a comprehensive and systematic study of the accuracy, precision and robustness of spICP-MS using the rigorously characterized reference material (RM) 8017 (Polyvinylpyrrolidone Coated Nominal 75 nm Silver Nanoparticles), recently issued by the National Institute of Standards and Technology (NIST). We report for the first time, statistically significant differences in frequency-based and size-based measures of transport efficiency with NIST RM 8013 Gold Nanoparticles and demonstrate that the size-based measure of transport efficiency is more robust and yields accurate results for the silver nanoparticle RM relative to TEM-based reference values. This finding is significant, because the frequency-based method is more widely applied. Furthermore, we demonstrate that the use of acidified ionic standards improves measurement of ICP-MS Ag response, but does not degrade the accuracy of the results for AgNP suspensions in water or various other diluents. Approaches for controlling AgNP dissolution were investigated and are shown to effectively improve particle stability in dilute suspensions required for spICP-MS analysis, while minimally affecting the measured intensity and allowing for more robust analysis. This study is an important and necessary advancement toward full validation and adoption of spICP-MS by the broader research community.

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Storage Wars: how citrate-capped silver nanoparticle suspensions are affected by not-so-trivial decisions

Cited by 58 publications

References 30 publications

Preparation of silver nanoparticle loaded cotton threads to facilitate measurement development for textile applications

Preparation of silver nanoparticle loaded cotton threads to facilitate measurement development for textile applications

NanoUV-VIS: An Interactive Visualization Tool for Monitoring the Evolution of Optical Properties of Nanoparticles Throughout Synthesis Reactions

Overcoming challenges in single particle inductively coupled plasma mass spectrometry measurement of silver nanoparticles

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